Surface Y2O3 layer formed on air exposed Y powder characterized by XPS

2020 ◽  
Vol 27 (2) ◽  
pp. 024010
Author(s):  
Kevin M. Cole ◽  
Donald W. Kirk ◽  
Steven J. Thorpe
Keyword(s):  
Y2o3 Layer

Characterization of Dielectric Properties of Alkoxy-Derived (Y,Yb)MnO3 Ferroelectrics/Insulator Stacking Layers

2006 ◽  
Vol 301 ◽  
pp. 65-70 ◽  
Author(s):  
Kazuyuki Suzuki ◽  
Kiyotaka Tanaka ◽  
Tatsuo Kimura ◽  
Kaori Nishizawa ◽  
Takeshi Miki ◽  
...  
Keyword(s):  
Thin Films ◽  
Dielectric Properties ◽  
Dielectric Property ◽  
Surface Morphology ◽  
Insulator Layer ◽  
Surface Smoothness ◽  
Y2o3 Layer ◽  
Mno3 Film ◽  
Mfis Structure

The (Y,Yb)MnO3 films were crystallized on Y2O3 layers using alkoxy-derived precursor solutions. As a result of investigation of the effect of the Y2O3 layer on the dielectric properties of the (Y,Yb)MnO3/Y2O3/Si, the crystallographic properties such as the orientation and surface morphology of the (Y,Yb)MnO3 thin films depended on the crystallographic appearance of the insulator layer. Following that, the dielectric properties of the MFIS structures varied. For the construction of excellent MFIS structure, the improvement of the orientation, crystallinity, and surface smoothness of the (Y,Yb)MnO3 film by the optimization of the microstructure and dielectric property of the insulator is necessary.

Effects of Y2O3 layer on the growth of YBa2Cu3O7−y thin film by metal organic chemical vapor deposition

2000 ◽  
Vol 336 (3-4) ◽  
pp. 295-299 ◽  
Author(s):  
Masato Hasegawa ◽  
Yutaka Yoshida ◽  
Morihiro Iwata ◽  
Koji Ishizawa ◽  
Yoshiaki Takai ◽  
...  
Keyword(s):  
Thin Film ◽  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Organic Chemical ◽  
Metal Organic ◽  
Organic Chemical Vapor Deposition ◽  
Y2o3 Layer

Formation of thin film YBaCuO Superconductors from Cu/BaO/Y2O3 Layer Structures

1987 ◽  
Vol 99 ◽  
Author(s):  
Chin-An Chang ◽  
C. C. Tsuei ◽  
C. C. Chi ◽  
M. R. Scheuermann ◽  
D. S. Yee ◽  
...  
Keyword(s):  
Thin Film ◽  
Electron Beam ◽  
Superconducting Films ◽  
Electron Beam Evaporation ◽  
Transition Temperatures ◽  
Phase Dependence ◽  
Annealing Temperatures ◽  
Layer Structures ◽  
Zero Resistance ◽  
Y2o3 Layer

ABSTRACTThin film superconductors of the YBaCuO family have been fabricated using layer structures of Cu/BaO/Y2O3 deposited by electron-beam evaporation. Using layer thicknesses off the stoichiometric YBa2Cu3O7, we have formed superconducting films with zero resistance above 77°K using MgO and SrTiO3 substrates. The films were found to be composed of both the superconducting YBa2Cu3O7 phase, and the non-superconducting green Y2BaCuO7 phase. Dependence of transition temperatures on the annealing temperatures and the substrates has also been studied.

Magnetic Properties of YBCO Single-Crystal Grown on Y2O3 Layer by a Cold Top-Seeding Method

2011 ◽  
Vol 25 (2) ◽  
pp. 391-397 ◽  
Author(s):  
Alev Aydıner ◽  
Bakiye Çakır ◽  
Mehmet Başoğlu ◽  
Hironori Seki ◽  
Atikorn Wongsatanawarid ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Single Crystal ◽  
Seeding Method ◽  
Y2o3 Layer ◽  
Ybco Single Crystal

Preparation and Properties of MPMG YBCO Bulk with Y2O3 Layer

2010 ◽  
Vol 24 (5) ◽  
pp. 1577-1584 ◽  
Author(s):  
Bakiye Çakır ◽  
Alev Aydıner
Keyword(s):  
Ybco Bulk ◽  
Y2o3 Layer

Flux Pinning in YBCO Single Crystal Grown on Y2O3 Layer

2013 ◽  
Vol 27 (5) ◽  
pp. 1123-1129
Author(s):  
B. Çakır ◽  
A. Aydıner ◽  
K. Karaoğlu ◽  
Ş. Duman ◽  
E. Yanmaz
Keyword(s):  
Single Crystal ◽  
Flux Pinning ◽  
Y2o3 Layer ◽  
Ybco Single Crystal

Solar Processing for the Glazing of ZrO2-Y2O3 Thermal Barrier Coatings: Reduction of Crack Initiation

2002 ◽  
Vol 124 (3) ◽  
pp. 315-317 ◽  
Author(s):  
Alain Ferriere and ◽  
Laurent Lestrade
Keyword(s):  
High Temperature ◽  
Crack Initiation ◽  
Thermal Barrier Coatings ◽  
Thermal Barrier ◽  
Fast Heating ◽  
Major Drawback ◽  
Barrier Coatings ◽  
Concentrated Solar Energy ◽  
Plasma Sprayed ◽  
Y2o3 Layer

The glazing of thermal barrier coatings using concentrated solar energy has already been demonstrated, but crack initiation appeared as a major drawback of this processing. In this paper, the thermo-mechanical effects resulting from the fast heating at high temperature were modeled. Crack initiation was found to result from high temperature gradients in the ceramic coating. Experiments performed on plasma-sprayed ZrO2-Y2O3 layer showed that a significant reduction of crack initiation was achieved when the specimen was preheated at temperatures in the range 500°C-800°C. The potential of the solar processing was improved and this technique becomes competitive with conventional laser processes.

Interface Oxidation Process of ZrO2-8%Y2O3 / CoNiCrAlY Thermal Barrier Coating System

2007 ◽  
Vol 345-346 ◽  
pp. 1035-1038 ◽  
Author(s):  
Hiroyuki Waki ◽  
Akira Kobayashi
Keyword(s):  
Thermal Barrier Coating ◽  
Growth Process ◽  
Thermal Barrier ◽  
Temperature Oxidation ◽  
Electron Probe Micro Analyzer ◽  
Barrier Coating ◽  
Delamination Life ◽  
Tbc Systems ◽  
Tgo Growth ◽  
Y2o3 Layer

Thermal barrier coating (TBC) of a gas turbine blade suffers from high temperature oxidation. It is known that thermally growth oxidation (TGO) grows at the interface between ZrO2- 8%Y2O3 and CoNiCrAlY, and the TGO degrades the adhesive strength. The purpose of this study is to clarify the TGO growth process. Thermal aging tests of ZrO2-8%Y2O3 / CoNiCrAlY TBC systems under various temperature conditions were carried out. TGO growth process was observed by an electron probe micro analyzer (EPMA). Both TGO of Al and TGO of other elements were examined, and the thickness of the TGOs were examined. Results are summarized as follows. (1) The delamination occurred at a ZrO2-8%Y2O3 layer beside the interface. (2) The growth rate of complicated TGO which consisted of Co, Ni and Cr increased with an increase of temperature. However, the complicated TGO wasn’t related with the delamination life. (3) The delamination could occur if the thickness of Al TGO increased more than about 3 μm.

Surface treatment to form a dispersed Y2O3 layer on Zircaloy-4 tubes

2018 ◽  
Vol 429 ◽  
pp. 272-277 ◽  
Author(s):  
Yang-Il Jung ◽  
Hyun-Gil Kim ◽  
Hwan-Uk Guim ◽  
Yoon-Soo Lim ◽  
Jung-Hwan Park ◽  
...  
Keyword(s):  
Surface Treatment ◽  
Y2o3 Layer

Transmittance enhancement of micro-grating structure sapphire with high-refractive index Y2O3 layer

2016 ◽  
Vol 64 (7) ◽  
pp. 777-780
Author(s):  
Shangjun Xu ◽  
Zhengjun Yao ◽  
Jintang Zhou ◽  
Youwen Liu ◽  
Chao Fang ◽  
...  
Keyword(s):  
Refractive Index ◽  
High Refractive Index ◽  
Grating Structure ◽  
Y2o3 Layer
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